Adjustable device for relating faceboard of curb mold to backobard thereof



' July 14, 1959 E .1-:. HOGAN ETAL 2,894,310 ADJUSTABLE DEVICE FORRELATING FACEBOARD oF CURB MOLD To BACKBOARD THEREOF Filed June 27, 1957Marl.'

rraA/EK I United States Patent i ADJUSTABLE DEVICE FOR RELATING FACE-BOARD F CURB MOLD T0 BACKBOARD THEREOF Eric 1E. Hogan and Robert S.Malloch, Riverside, Calif.

Application June 27, 1957, Serial No. 668,543

1 Claim. (Cl. 25-118) This invention relates to the art of assemblingmold boards for forming a mold to cast a concrete curb and particularlyto quickly demountable devices for relating the faceboard of the mold toluhe backboard thereof.

It is a particular object of the invention to provide such a devicewhich may be readily employed to set up a mold `and then to disassemblethe latter without the use of any special tools.

Itis another object of the invention to provide such a device which willaccommodate itself without adjustment to faceboards varyingsubstantially in breadth.

Devices of this character are generally made to support the faceboard ina given angular relation with the backboard of the mold. Thus anentirely ditferent set of such devices is required where there is achange in this angle.

It is a further object of the invention to provide a device for relatingthe faceboard of a curb mold to the backboard thereof which is readilyadjustable so that these devices may be set to give the desired anglebetween the faceboard and the backboard of the mold on any particularjob in which these devices are used. v

Board spacers heretofore employed extend directly across the top of themold and thus offer some interference with the operations of the manfinishing the upper face of the curb.

It is yet another object of the invention to provide such a boardspacing device which will not interfere substantially with the operationof finishing the top surface of the curb.

The manner of accomplishing the foregoing objects as well `as furtherobjects and advantages will be made manifest in the followingdescription taken in connection with the accompanying drawings, inwhich:

Fig. l is a fragmentary plan view of a curbmold in which a preferredembodiment of the invention is shown properly relating the faceboard tothe backboard of the mold.

Fig. 2 is a vertical sectional view taken on the line 2 2 of Fig. 1.

Fig. 3 is an enlarged fragmentary vertical sectional view taken on theline- 3 3 of Fig. 1 and illustrating the reverse face of the adjustingmeans of the invention.

Fig. 4 is a sectional detail view taken on the line 4 4 of Fig. 3.

Referring specically to the drawings, the invention is illustratedtherein as comprising a board spacing device which is employed inrelating the faceboard 11 of a curb mold 12 to the backboard 13 of saidmold.

In the mold 12, the backboard 13 is always placed in vertical positionon a graded surface 14 of the soil 15 on which the curb is to beerected. After the surface `14 has been graded and the backboard 13placed upright in its proper position thereon, as shown in Fig. 2, "astake 16, which is preferably a steel rod of -about three-quarter inchdiameter and pointed at the lower end', is driven into the soil 15 tolie directly CC i back of the backboard 13 and in aligned contact withsaid board throughout the full height of the latter.

The device `10 is then placed over the upwardly extending end portion ofthe stake 16 and lowered onto the upper edge of backboard 13 as shown inFig. 2. This device includes a stake clamp 20 having a U-shaped body 21,the latter being provided with aligned horizontal apertures ZZ forreceiving Ia shaft 23, one extending end of which is bent to form ahandle 24 and the other extending end of which carries a. head 25 whichretains shaft 23 in place. This shaft is slightly bent so as to have aneccentric binding action 'when rotated as will be made clearhereinafter. A lock-bar 26 vent to form a long leg 27 and a short leg28, is disposed within the U-shaped body 21 and has a keeper strap 29welded thereto to form a loop through which shaft 23 extends, therebyretaining lock-bar 26 assembled on said shaft.

Welded to the front wall 34 of the body 21 is the lower end of avertical leg 35 of an inverted U-shaped spacer bar 36, the other leg 37of which extends at an obtuse angle downwardly to a point just above theupper edge of the faceboard 11 when the latter is properly positioned inthe mold 12. The lower end of the leg 35 rests on top of the backboard13 andis provided with a nger 34 which is welded thereto and extendsdownwardly to overlap the upper front corner of the backboard 13, asshown in Fig. 2.

Pivotally mounted on the lower back corner of the spacer bar leg 37 is aIfaceboard jig 38. This jig includes a jig base 39 which comprises avertical plate welded at its lower end to one edge of a faceboard jaw 40which is adapted to embrace the upper edge of faceboard 11 as shown inFig. 2. Welded to the opposite edge of the jaw 40 is a short metal bar41 which cooperates with the plate 39 to :form a shallow channel intowhich the lower end of the spacer bar leg 37 tits as shown in Fig. 3.

When tihe leg 37 is thus related with the jig 38, a holel 42 formed insaid leg is aligned with corresponding holes formed in the plate 39 andbar 41 and a bolt 43 is extended through these holes so as to pivotallymount the jig 38 on the spacer bar 36 on the yaxis of these holes. Groupof holes 50 and 51, and group of holes 52 and 53, are also formed in theleg 37 with the holes of each group located at different radialdistances from the axis of bolt 43 as clearly shown in Fig. 3. Holes 50and 51 are formed `at radius 54 from said axis while holes 52 and 53 are`formed at radius 55 therefrom.

Also formed in jig base plate 39, at radius 54, is a holev 56, Iand atradius 55 is a hole 57. A bolt 58 is provided which is adapted to beextended through the hole 56 and either one of the holes 50 or 51 in leg37; or bolt 58 is adapted to be extended through hole 5'7 and either oneof the holes S2 or 53 in leg 37. The holes 50 and 51 are so related tothe hole 56 and the holes 52 and 53 are so related to the hole 57 thatthis combination of holes provides an opportunity to set the spacer bar36 relative to the jig 33 so that the latter will relate faceboard 11 inany one of four precise angular relations with the backboard 13depending upon which combination of holes bolt 58 is inserted through.When the bolt 58 is thus inserted through any pair of holes provided inthe jig base 39 and the spacer bar leg 37, a nut 59 is set on said boltso as to rigidly unitethe spacer b-ar 36 with the jig 3S with the latterin the angular relation exclusively produced by this particularcombination of holes.

Welded to the -front edges of the jig base 39 and jaw 4t) is a faceboardguide tube 65. The upper end of this tube is disposed below the upperend of jig base 39 and the lower end of this tube terminates at a pointabove the lower edge of the faceboard 11. An oil hole 66 is provided intube 65 for introducing oil. Slidably and rotatably mounted in the tube65 is a rod 67 having a Patented July 14,r 1959` lower faceboardgrippingv jaw 68 bent from the lower end thereof. The rod 67 extendsupwardly from the upper end of -tube 65, where it has a series of spacedholes 69,formed, therein; through one oi which av Cotter.` 70 isinsertedfon trapping a. coil: springg71, surrounding.

the rodl 67, between, said Cotter. and the upper end'` of tube 65..After the-11od 67 hasthus been assembled toextend throughthetube 65and-t spring 71', an upper. endy portion 73 of, saidt rod isV` bent..therefrom. to form a` handle.

, Operation.

Whenr the device i ismoved downwardly over the= stakei16, asfshown in1Eigsl 1i andi 2, the1stakef extends. through'- the enclosedfi space 75vprovided within the-A UL,

stakewith` spaced sharp cor-ners directly engaging thelatter;Theverticalldimension of. thebody 21 is approxi-f mately 1% inches: and`when theI clamp.- 20 is: positionedon: stake 16 as; shown: inFigs 1 and`2' andi the handle 24 turnedl tofrotateA the shaft 23". to4 eiecty aneccentriclike binding, action against the lock-barV 26, the sharpcornersof the: latten yare pressed against the stake 16v tolock.'the'vlatter'in a1 vise-.like grip against the frontwall 3'4of the body21; This'` actionunites` the body 21 withl the stake'- 161 soy as topractically prevent any rotation; of the' devicev 101 relative to thestake 16 in the.,

jigfibaser39 to cause.y the faeeboard: 111 to be given they properVangular relation withfbackboard IS-Whenlthe face-Iboard-111iis:assembledin the-jig 38. 'Iheilatter srtepris ac complishedin,I thezfollowingi manner.

With thestakeclampsA 20 rigidly locked on the stakesl 176 as abovedescribed, they faceboard 11 is lifted by the mold assembling crew=andthe lower edge ofV the faceboard isl rested ony thejaws: 68, whichareV turnedV toward `thisrboardrin'the samedirectionthey are shown asydisposed in Eig. 2'.r The board-11i is-nowpressed downwardly-to'cornpressthe'spring 7.1 until= the upperiedge of the faceboardv 112lieszbelow the upper jaw 40foffthejig 38. The aceboardfl'l isynow-rocked 1 towards and into ush contact with the guide tube 65whereupon downward pressure on: theeboard4 1211' iscrelaxed; allowingthesprings 71'-, of` thevarious-devices` 101in the mold? 12, to liftJ thefaceboard" 11y untilits upper ed'ge` reposes in the upper jaw 40:01?.the jig. as shownf in Fig: 2.

With the mold'thus-i-assembl'edlit is readyfor` thepouring,I of1concretez which: lls the space within` themoldV upto the broken'` lines802 and 81, it being the commonpractice to) simultaneously cast a" curband gutter as an integralsstructure. When the concrete thus cast hassetV suiciently toretain itslform, and:V this tak-esfplace inaIrelatively` few minutes, the mold 12 may lbedisassembled- Toxdo'this,Ithe crewmembers walk alongthe mold,

pressingffdown.manually onL the handle 73 ofeach of the devices 10soaszto compress-its-spring 71 and lower the jawf68tout ofcontact-withthe Ibottom edge of the faceboard: 11, whereuponthe crew memberrotates'the rod' the springsV 71"l yto liftwth'e t jaw 6.8i above theconcrete, surface 81. The crew member now turns the handle 24 of j thestake clamp 20 in a reverse direction from that in which it was turnedto set the clamp on the stake 16, thereby relaxing the hold of the clampon the stake and permitting the lock-bar 26 to be pushed upward andbackward so that it hangs down from the shaft 23 out of operativecontact with the stake 16. The device 10 is now, completelyfreed fromthe v yfaceboardl 11, backboard 11i-and stake^16` and may beV lifteddirectly upward, off of said stake.

The devices 10, thus removed,V are free to be trans; ported immediatelyVto an advance' section of' the curb molding'l job andre-employed insetting upyanf extension of the mold 12.

While only a single preferredI embodiment of the invention has beendisclosed herein lit is to be understood that various changes andmodifications may be made in Ithis without departingrfrom thev spiritofthe, invention or the scope of the appended claim.

The claim is:

An adjustable device for optionally fixing., theA face board of a curbmold in: any one. of a` plurality of precise angular relations with thebackboard of'said mold,4 said device comprising: asteel stake drivenYvertically, a, substantial distance into the soil, whenA in use,inrflush, contact with. `the back` face ofrsaid backboard, a portion ofsaid stake extending above said backboard; ay stake? clamp having avertical opening for receiving saidup wardly extending portion off saidstake. and manually operative to grip4 saidV stake sotightly astojvrender the, clampV immovable relative to saidl stake;, al spacer`Vhat? integrally unitedY with said clamp and-v extending; there?. fromto a horizontal line parallel with said backboardr and disposed justabove the upper edge of-y saidgfaceboard when the latter is locatedinfany of said precise.relationsl with said backboard; means on saiddevice -forengaging said backboard to holdv the latter againstsaidstakeg al jig for gripping said faceboard, saidy jig including, abodyP providing a guide againstrwhich anv outer face o said; faceboardrests when the latter isheld in; said) j ig a jaw` integral with saidbody against which anupperf edgeof said faceboard rests when.; thelatter is held: in said; jig, a lower jaw shiftably provided on said,body and manually operable means on saidy jig for; shiftingg; said lowerjaw between a position awayI frombeneath; saith faceboard and a positiontherebeneath, andthenftoward;V said faceboard to clamp the same betweensaidijaws,said;l meansv then retaining saidn yfaceboardi so clamped;pivot means for pivotallyuniting'saidr jig bodyand-'said spacer-5. bnron said horizontal line; `and plural`r adjustmentV hole; and bolt meansfor optionally uniting said jig bodyto; said spacer bar in any one of a`pluralityy of precise angular rotational positions about said,l linerelative; to,y said bar, eachfofsaid positionsicausing said-:iigtorholdi said aceboard in a particular one of said precise angular,Trelations with` said. backboard.

References Cited. inthe tile` of. thislpatent` UNITED` STATESvPA'lTElI'l'iSv 1,628,316' Heltzel May 10; 1927'n 1,643,578: Eatonret alSept; 2,7, 19,27 2,180,842 Winding Nov. 121321939* 2,342,440 WhitsittFeb.r 22; 1944 V2,610,660, lenningsV etial; SeptzV 16, 1952' 2,688,174Hogan Sept; 7,' 1954'" 2,704,390?` Hummel' Mar. 22; 1955?

